SquirrelMail G/PGP plugin: Arbitrary code execution
Gentoo Linux Security Advisory
||GLSA 200708-08 / squirrelmail
||August 11, 2007
||August 11, 2007: 01
All supported architectures
Multiple vulnerabilities have been discovered in SquirrelMail, allowing for
the remote execution of arbitrary code.
SquirrelMail is a webmail package written in PHP. It supports IMAP and
The functions deletekey(), gpg_check_sign_pgp_mime() and gpg_recv_key()
used in the SquirrelMail G/PGP encryption plugin do not properly escape
An authenticated user could use the plugin to execute arbitrary code on
the server, or a remote attacker could send a specially crafted e-mail
to a SquirrelMail user, possibly leading to the execution of arbitrary
code with the privileges of the user running the underlying web server.
Note that the G/PGP plugin is disabled by default.
Enter the SquirrelMail configuration directory
(/usr/share/webapps/squirrelmail/version/htdocs/config), then execute
the conf.pl script. Select the plugins menu, then select the gpg plugin
item number in the "Installed Plugins" list to disable it. Press S to
save your changes, then Q to quit.
All SquirrelMail users should upgrade to the latest version:
Code Listing 3.1: Resolution
# emerge --sync
# emerge --ask --oneshot --verbose ">=mail-client/squirrelmail-1.4.10a-r2"